In support of the trap hypothesis. Chymotrypsin is not rigidly held in its complex with human alpha 2-macroglobulin.
In support of the trap hypothesis. Chymotrypsin is not rigidly held in its complex with human alpha 2-macroglobulin.
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支持陷阱假说。
DOI:
10.1021/bi00393a003
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发表时间:
1987
期刊:
影响因子:
2.9
通讯作者:
Cunningham,LW
中科院分区:
文献类型:
--
作者:
Crews,BC;James,MW;Beth,AH;Gettins,P;Cunningham,LW
Materials and MethodsPurification of a2M. Human a2M was purified from hu-man plasma by zinc chelate chromatography and gel chro-matography, as described previously (Dangott & Cunningham, 1982). The purity of each preparation was checked by elec-trophoresis under nondenaturing conditions and also in the presence of SDS. Nondenaturing polyacrylamide gel elec-trophoresis was performed in 5% acrylamide slabs (Davis, 1964). SDS-polyacrylamide gel electrophoresis was carried out in 7.5% slab gels according to the procedure of Laemmli (1970). a2M concentrations were determined spectrophoto-metrically byusing E2f0= 8.9 (Hall & Roberts, 1978; Barrett et al., 1979) and a molecular weight of 716000 based on the primary structure (Kristensen et al., 1984). Iodination of Chymotrypsin. Iodinated chymotrypsin was prepared as described by Sottrup-Jensen et al.(1981) modified as in the procedure of Carpenter and Cohen (1976). Chy-motrypsin, 300 µ, in 50 mM phosphate buffer at pH 7.5 was reacted with Na125I at a slight molar excess of iodide in the presence of a 5-fold molar excess of chloramine T (Hunter
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DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
E. Shimshick;H. Mcconnell
通讯作者:
H. Mcconnell
影响因子:
4.1
作者:
P. Hall;R. Roberts
通讯作者:
R. Roberts
影响因子:
4.8
作者:
J. Morrisett;C. Broomfield
通讯作者:
C. Broomfield
影响因子:
4.8
作者:
L. Berliner;S. Wong
通讯作者:
S. Wong
DOI:
--
发表时间:
1982
期刊:
Hoppe-Seyler´s Zeitschrift für physiologische Chemie
影响因子:
--
作者:
H. Schramm;W. Schramm
通讯作者:
W. Schramm